What you mean is to add support for triggers in the Cloud server, which is something slightly different. Yes, there's something we should work on, and there are some suggestions about this already in UserVoice.

We are working on two sides here: one is adding native support for Plastic to Unity Cloud Build, something we are trying to move forward with Unity as I speak. Not sure when it will happen, though.

Second: we definitely want to add GitServer support to Plastic Cloud. In fact, it was the primary reason to have GitServer in the first place. But moving it to Cloud means refactoring some code, and we are still on it. We expect to have it in the next few months, we wanted to have it earlier but we got totally swamped.